Improvement in lock-nut



MAURICE LANGHORNE, OF WASHINGTON, DISTRICT OF COLUMBIA.

Letters Patent No. 99,919, (lated February 15, 1870.

IMPROVEMENT IN' LOCK-NUT;

l'he Schedule ieerred to in these Lettera Patent and making part of thesame.

To all whom it .may concern Be it known that I, MAURICE LANGHORNE, ofthe city and county of Washington, in the District of Oo lumhia, haveinvented a new and improved Nut-Loek; and I do hereby declare that thefollowing is` a. full, clear, and exact description of the same,reference being had to the accompanying drawings, making a part of thisspecification, in which- Figure 1 isa side elevation;

Figure 2, a longitudinal section;4 and Figure 3 is and end View.

This inventionfhas for its object to prevent the turning backof a'nutafter ithas once been screwed on its bolt astightly as may be necessaryin order to clamp the material through which the bolt passes.

I u the drawings- A A is an exteriorly-threaded bolt, having alongitudtnal groove, a, cut iu one side.

B is a washer, whose upper surface is serrated, so as to form ratchet.

The washer incluses the bolt A, and has a tongue, b, tig. 2, whichenters the groove a, and so prevents the washer from turning on thebolt. Instead of 4the tongue b, the washer may be finished with astraight facet on its inner edge, the bolt A being finished with acorresponding facet. g

C is a nut, screwed upon the bolt A and provided with a spring-pawl, c,lig. 1, the same consisting, in

i this instance, of a wire in the shape of an inverted U,

whose legs pass through orifices iu the nut, one end being upset flushwith the lower face of the nut, and the other end projecting below thesaid lower face. Hence, when the nut and washer are 4forced intoclosecontact, by screwing the former upon the bolt and clamping the latterbetween the nut and the material through which thevbolt passes, theprojecting end of the paw! c rubs over the ratchet, and, while thelatter presents no obstacle to screwing the. nut on, it prevents the nutfrom-'turning backward accidentally.

Having thus described my invention,

What I claim as new, anddesire to secure by Letters Patent, is-

1. 'lhe combination ofa ratchet'washer with a-screwthreaded nut providedwith a springdetent, substantially as and for the purpose speeiiied.` 2;'lhe combination of aratchet-washer with ascrew- 'threaded nut providedwith 'a spring-detent and with a screwthreaded bolt or axle,substantially as and for the object set forth.

ATo the above specification of my invention I have signed my hand this18th day of January, 1870.

M. LAN GHORN E.

Witnesses:

CHAs. A. PETTIT, GEO. E. BnowN.

